package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;


    /**
     *
     * 员工登录
     * @param request 客户端的请求信息
     * @param employee 员工实体
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {

        // 在这里，使用了@Requesttion注解,employee对象会自动包含请求体中的JSON数据转换后的内容

        //从employ中获取password
        String password = employee.getPassword();
        //进行md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //LambdaQueryWrapper是MyBatis-Plus提供的一个强大的条件构造器，用于"构建数据库查询条件"
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        //从查询条件queryWrapper中获取一个结果
        Employee emp =employeeService.getOne(queryWrapper);

        if(emp == null){
            return R.error("用户名错误");
        }

        if(!emp.getPassword().equals(password)){
            return R.error("密码错误");
        }

        if (emp.getStatus()==0){
            return R.error("账号已禁用");
        }

        //session 会话
        //attribute 属性
        //Session的主要作用是存储用户会话状态信息，如用户的登录状态、购物车中的商品、用户偏好设置等。
        // 这些信息在服务器端存储，确保用户在不同页面之间跳转时，能够保持会话的连续性。
        //将员工id存入Session
        request.getSession().setAttribute("employee",emp.getId());

        return R.success(emp);
    }

    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清除Session中保存的员工id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("新增员工信息：{}",employee.toString());

        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        Long empId = (long) request.getSession().getAttribute("employee");
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);

        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     *分页管理
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page={},pageSize={},name={}",page,pageSize,name);

        //构造分页构造器
        Page<Employee> pageInfo = new Page(page,pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询
        employeeService.page(pageInfo,queryWrapper);
        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());

        Long id = Thread.currentThread().getId();
        log.info("线程id为:{}",id);

//        Long empId=(Long) request.getSession().getAttribute("employee");
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);

        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById (@PathVariable Long id){
        log.info("根据id查询员工信息...");
        Employee employee = employeeService.getById(id);
        if(employee!= null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
